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Provides a way to create graphs for JChav.
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Typical usage example:

<pre><tt>
	// Create the chart based on some Measurement data:
	Chart chart = chart = new MinMeanMaxChart(pageId, data);
	
	// Set the size for the full-sized image:
	chart.setWidth(640);
	chart.setHeight(480);
	
	// Store it:
	FileOutputStream out = new FileOutputSream(new File("someplace.png"));
	chart.write(out);
	out.close();
	
	// Write a thumbnail version, at 25% of the size:
	chart.setThumbnailScale(0.25d);
	FileOutputStream thumb = new FileOutputSream(new File("thumb.png"));
	thumb.writeThumbnail(out);
	thumb.close();
	
</tt></pre>


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